Product Core Brief

• Model: MVAW11B1AB0513A
• Brand: ALSTOM / GE Vernova
• Series: ALSTOM MVAW Interposing/Auxiliary Relay Family
• Core Function: Electromechanical interposing/auxiliary relay used to interface protection outputs with breaker trip coils, interlock chains, alarm circuits, and DC control circuits.
• Product Type: Interposing Relay / Auxiliary Relay / Draw-Out Relay
• Key Specs: DC or AC coil options | Dry changeover contacts | Draw-out case | Mechanical flag/indicator | No communication interface
• Condition: New Original / New Surplus

Product Introduction

ALSTOM MVAW11B1AB0513A is a heavy-duty electromechanical interposing/auxiliary relay from the ALSTOM MVA relay family, now referenced under GE Vernova. It is designed for protection and switchgear panels where a robust relay is needed between protective devices and circuit breaker trip circuits, interlock chains, or auxiliary DC control circuits.

The relay is housed in a draw-out case with rear terminal connections, allowing the relay element to be withdrawn for testing or replacement without disturbing permanent panel wiring. It provides dry changeover contacts for tripping, alarm signaling, permissive control, and interlocking duties. A mechanical flag or indicator is commonly fitted to confirm operation during commissioning and post-fault inspection.

Public spare listings describe MVAW11B1AB0513A as an electromechanical auxiliary/tripping relay with no communication interface. Some third-party pages incorrectly describe it as a digital feeder management relay with overcurrent, earth fault, Modbus RTU, IEC 60870-5-103, or DNP3 functions; those descriptions are inconsistent with the MVAW interposing relay family and should not be used as the sole basis for replacement. Always verify the installed nameplate, coil voltage, contact arrangement, and panel drawing before procurement.

Key Technical Specifications

Quality Control Process

• Visual and code check: Confirm MVAW11B1AB0513A labeling, case condition, terminals, flag/indicator, and front hardware.
• Coil verification: Confirm coil voltage (DC or AC) matches the installed nameplate and panel drawing before energizing.
• Contact operation check: Verify pickup, drop-off, contact bounce behavior, and changeover contact operation under rated coil voltage.
• Draw-out mechanism check: Confirm smooth insertion/withdrawal and correct rear terminal engagement.
• Final packing: Record test results, apply asset labels, and ship with terminal and case protection.

Replacement Pitfall Guide

❗ Confirm coil voltage from the nameplate. MVAW11 variants may use different DC or AC coil ratings; applying the wrong voltage can prevent operation or damage the coil.

❗ Verify contact arrangement and current rating. The number of changeover contacts and their making/breaking capacity must match the trip, interlock, and alarm circuits.

❗ Do not treat it as a digital protection relay. MVAW11B1AB0513A is an electromechanical interposing/auxiliary relay with no settings menus, protection algorithms, or communication ports.

❗ Check draw-out case compatibility. The replacement must match the case footprint, terminal layout, and mounting cutout to avoid panel rewiring.

Keep these in mind and you’ll cut 90% of rework time.

Compatibility Matrix & Benchmarks

• Typical use: MV/HV substations, switchgear OEM and retrofit, feeder/transformer/generator protection panels, DC trip circuits, intertripping schemes, and auxiliary control panels.
• Key verification points: MVAW11B1AB0513A part number, coil voltage (DC/AC), contact configuration, draw-out case type, and panel wiring drawing.